Britney Spears is very unhappy with the increase in Kevin Federline's child support

Britney Spears and Kevin Federline have reached a new alimony agreement, but E! News learned that the singer was "very unhappy" with the result.

The Blast reports that the 36-year-old "Gimme More" singer has agreed to pay her ex-40-year-old "extra thousands per month of child support." This news comes a month after Spears was sentenced to pay $ 110,000 to Federline as part of their battle for child support.

"They are not happy and think the regulation is ridiculous," said a source to E! News regarding the reaction of the Spears team to the new deal. "But they wanted to make an agreement to move forward."

Regarding Brit, the insider says she is "very upset" but understands that it is "in her best interest" to get out of the legal turmoil. "She was tired of fighting about it and is ready to continue her life and put it behind her," says the source.

The former couple, who formed a bond in 2004 and separated in 2006, shares two sons together, Jayden James, 11 and Sean Preston, 12.

In response to the new agreement, Federline's lawyer Mark Vincent Kaplan tell E! News, "I am pleased that they have agreed to resolve this issue, I am sure they decided that the money would be better spent on child support than on legal fees, which would have resulted the same result for Kevin in the hundreds of thousands of dollars in litigation, they made a wise decision. "

A source close to Federline also confirms to E! News that Spears and Federline teams met and held talks throughout the week, "Friday signed a stipulation that would resolve all outstanding issues that Kevin had asked the court to rule."

"Kevin is getting more money a month than he originally asked before depositing his RFO, so Britney's team would have done better with Kevin at the time because he was receiving more than he had originally asked for "shares. "Britney has agreed to pay additional legal fees that have been incorporated into the settlement, in addition to the $ 100,000 that Mark Kaplan has already received."

"Kevin is extremely happy for himself, for the kids and for Britney," the source continues. "It was the right thing to do on his behalf and it allows children to enjoy the standard of living that both parents can offer them."

The insider adds that this new monthly child support payment he's receiving is not based on a court-ordered order. This is a figure on which both parties have agreed on the income and expected revenues of Spears. They are told that their day care stays the same.

As for what Kevin does for the job, the insider tells E! News that it is "true that he no longer dances, currently for work he has DJ jobs and jobs for record production".

In February, E! News learned that Federline had hired a divorce lawyer, Kaplan, in the hope of reviewing their support order. The following month, a source close to Spears told E! News: "They are negotiating with Kevin. Kevin's attorney is the one who has talked about Britney's recent successes and is trying to get more money. We hope to solve it."

According to court documents obtained by E! At the time, Federline was receiving $ 20,000 a month in child support, the same amount he had been receiving since 2008. Then, in May, Federline filed legal documents requesting a change in its labor contract. alimony with Spears and asked him to cover the fees of his lawyer.

E! News contacted the Spears representative to comment.